DE2326721C2 - Carburizing process - Google Patents
Carburizing processInfo
- Publication number
- DE2326721C2 DE2326721C2 DE2326721A DE2326721A DE2326721C2 DE 2326721 C2 DE2326721 C2 DE 2326721C2 DE 2326721 A DE2326721 A DE 2326721A DE 2326721 A DE2326721 A DE 2326721A DE 2326721 C2 DE2326721 C2 DE 2326721C2
- Authority
- DE
- Germany
- Prior art keywords
- liquid
- scrap
- vessel
- collecting vessel
- flame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0025—Adding carbon material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/56—Manufacture of steel by other methods
- C21C5/562—Manufacture of steel by other methods starting from scrap
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
senden Kohlenstoffauskleidungen, etwa Wandungen oder Böden aus Kohlenstoff, zugestellt weiden. Die Tauchkörper können ähnlich wie die Stopfenstangensend carbon linings, such as walls or floors made of carbon, lined up to graze. the Immersion bodies can be similar to the stopper rods
einer Pfanne angebracht sein und in Form zylindri-be attached to a pan and in the form of cylindri-
45 scher Kohlenstoffstangen während des Füllprozesses unter der Schlackenschicht aufgelöst werden. Kohlenstoffböden können beispielsweise durch Einstampfen von Kohle so erzeugt werden, daß sie während des Füllprozesses nicht aufschwimmen.45 shear carbon rods are dissolved under the slag layer during the filling process. Carbon soils can for example be produced by pulping coal so that they during do not float up during the filling process.
Die vorliegende Erfindung betrifft ein Verfahren 50 Die Erfindung wird im folgenden an Hand der in zum Aufkohlen von kontinuierlich eingeschmolze- den Zeichnungen dargestellten Ausführungsformen nem Metall in einem Auffanggefäß. näher erläutert.The present invention relates to a method 50 The invention is described below with reference to the method shown in for the carburization of continuously melted-down drawings a metal in a collecting vessel. explained in more detail.
In der deutschen Patentschrift 1 800 610 wird ein Fig. 1 und 2 zeigen das Aufkohlen mittels einesIn German Patent 1,800,610, FIGS. 1 and 2 show the carburizing by means of a
Verfahren zum Einschmelzen von Schrott, insbeson- Kohlestabes bzw. eines Kohlebodens,
dere Stahlschrott, beschrieben, wobei die Schrott- 55 Fig. 1 zeigt schematisch ein Einschrnelzgefäß 1
säule von unten durch eine Flamme beaufschlagt mit einem Einsatz 2 aus Schrott, Eisenschwamm
wird. Hierbei wird eine zentralliegende tellerförmige od. dgl., der mittels einer durch den Einsatz 2 geführ-Flamme
verwendet, die den größten Teil des Säulen- ten Brennerlanze3 erzeugten tellerförmigen
querschnittes einer Schrottsäule von im wesentlichen Flamme 4 von unten, wie in der deutschen Patent-
gleichbleibendem Querschnitt überstreicht. Die tel- 60 schrift 1800610 beschrieben, aufgeschmolzen wird,
lerförmige Flamme wird dabei so weit über den Bo- Durch seitliche öffnungen oder einen Ringspalt 5
den des Einschmelzgefäßes geführt, daß das abflic- kann Luft oder Sauerstoff zum Nachverbrennen der
ßende, flüssige Schmelzgut einen Wärmeschutz für Einschmelzabgase, die auf diese Weise zum Vorwärdie feuerfeste Auskleidung bildet. Die Flamme wird men des Einsatzmaterials dienen, eingeführt werden,
mit Hilfe einer Brennerlanze erzeugt, die innerhalb 63 Das eingeschmolzene flüssige Schmelzgut fließt
der Achse des Einschmelzgefäßes entweder durch die durch eine Öffnung 6 im Boden des Einschmelzgefä-Schrottsäule oder von unten durch den Boden ge- ßes 1 ab.
führt ist. Das abfließende Schmelzgut kann bei die- Das flüssige Schmelzgut wird in einem Auffangge- Process for melting down scrap, in particular carbon rods or a carbon base,
Their steel scrap, described, the scrap 55 Fig. 1 shows schematically a restriction vessel 1 is acted upon from below by a flame with an insert 2 made of scrap, sponge iron. Here a centrally located plate-shaped od. The like., Which uses means of a Led-flame by the use of 2, the most of the column th Brennerlanze3 dish-shaped cross section produced a scrap column of substantially flame 4 from below, as described in German Patent constant cross-section. The tel- 60schrift 1800610 describes, is melted, the ler-shaped flame is guided so far over the bottom through side openings or an annular gap 5 that the flic- air or oxygen for afterburning the ßende, liquid melt material a heat protection for melt- down exhaust gases, which in this way form the refractory lining for preheating. The flame will be used for the input material, generated with the help of a burner lance, which flows within the axis of the melting vessel either through the scrap column through an opening 6 in the bottom of the melting vessel or from below through the bottom. ßes 1 from. leads is. The melted material flowing off can be The liquid melted material is collected in a collecting
faß 7 aufgefangen, in dem während des Füllprozesses ein Kohlestab 11 mittels einer Stange 12 od. dgl. gehalten wird-, so daß der Kohleistab Il durch die oben schwimmende Schlacke 8 in das flüssige Metallbad 9 eintaucht und dort aufgelöst wird.barrel 7 caught in which a carbon rod 11 by means of a rod 12 or the like. is held during the filling process becomes- so that the carbon rod Il through the above floating slag 8 is immersed in the liquid metal bath 9 and is dissolved there.
F i g, 2 zeigt ein Auffanggefäß 7, dessen Boden mit einem sich selbst auflösenden Kohlenstoffmaterial 13 zugestellt ist. Diese Kohlenstoffschicht IJ wird beispielsweise durch Stampfen erzeugt, so daß sie während des Füllprozesses nicht aufschwimmt und somit in dem darüber befindlichen Metallbad aufgelöst wird,FIG. 2 shows a collecting vessel 7, the bottom of which is covered with a self-dissolving carbon material 13 is delivered. This carbon layer IJ is produced, for example, by stamping, so that they during during the filling process does not float and is therefore dissolved in the metal bath above will,
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (2)
gleichbleibendem Querschnitt von unten mittels Aufgabe der vorliegenden Erfindung ist es daher. einer zentralliegenden tellerförmigen Flamme be- 30 das Einschmelzverfahren von Schrott, Eisenaufschlagt wird, die den größten Teil des Säulen- schwamm, Pellets od. dgl. insbesondere nach der querschnittes überstreicht, und d> tellerförmige deutschen Patentschrift 1800 610 in der Weise zu Flamme so weit über dem Bcxlen des Gefäßes ge- verbessern, daß eine Aufkohlung ermöglicht wird. führt wird, daß das abfließende flik-üge Schmelz- die besonders dann wichtig ist, wenn kein flüssiges gut einen Wärmeschutz für die feuerfeste Aus- 35 Roheisen zur Verfügung steht, das in das Auffanggekleidung nach Patent 1 800 610 bildet, dadurch fäß vor oder während des Einfließens von flüssigem gekennzeichnet, daß der Boden oder die Wan- Schmelzgut eingefüllt werden kann.2. Introduce a method for melting down the known way coal into the material in the collecting vessel in the form of scrap, pre-reduced lent liquid melt, since this would not sink into the liquid metal, not sponge iron, pre-reduced pellets or the like. The top of the scrap column from below through a floating coal would be acted upon by the FeO slag flame and especially slagged in, so that no direct contact of a scrap column of essentially between metal and coal can arise,
A constant cross-section from below by means of the object of the present invention is therefore. A centrally located, plate-shaped flame is used to melt down scrap and iron, which sweeps over most of the columnar sponge, pellets or the like, especially after the cross-section, and the plate-shaped German patent specification 1800 610 in the manner of flame so far Improve over the top of the vessel so that carburization is made possible. The result is that the flowing melt is particularly important when there is no liquid good heat protection for the refractory cast iron available, which forms in the collecting casing according to patent 1,800,610, thereby vat before or during the inflow of liquid characterized that the bottom or the Wan melt material can be filled.
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2326721A DE2326721C2 (en) | 1973-05-25 | 1973-05-25 | Carburizing process |
| BE142436A BE812819A (en) | 1973-05-25 | 1974-03-26 | RECARBURATION PROCESS |
| IT5057674A IT1046246B (en) | 1973-05-25 | 1974-04-23 | METAL SCRAP MELTING PROCEDURE AND DEVICE |
| FR7415369A FR2230733B2 (en) | 1973-05-25 | 1974-05-03 | |
| GB1964574A GB1461579A (en) | 1973-05-25 | 1974-05-03 | Carburizing process |
| CA199,401A CA1012778A (en) | 1973-05-25 | 1974-05-09 | Carburizing method |
| ZA00743011A ZA743011B (en) | 1973-05-25 | 1974-05-10 | A method of carburizing continuously melted metal in a collecting vessel |
| AU69034/74A AU479229B2 (en) | 1973-05-25 | 1974-05-16 | Carburizing process |
| US05/472,892 US3953197A (en) | 1973-05-25 | 1974-05-23 | Production of carburized iron |
| BR427274A BR7404272D0 (en) | 1973-05-25 | 1974-05-24 | LOAD FOUNDATION PROCESS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2326721A DE2326721C2 (en) | 1973-05-25 | 1973-05-25 | Carburizing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2326721B1 DE2326721B1 (en) | 1974-06-12 |
| DE2326721C2 true DE2326721C2 (en) | 1975-01-30 |
Family
ID=5882158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2326721A Expired DE2326721C2 (en) | 1973-05-25 | 1973-05-25 | Carburizing process |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US3953197A (en) |
| BE (1) | BE812819A (en) |
| BR (1) | BR7404272D0 (en) |
| CA (1) | CA1012778A (en) |
| DE (1) | DE2326721C2 (en) |
| FR (1) | FR2230733B2 (en) |
| GB (1) | GB1461579A (en) |
| IT (1) | IT1046246B (en) |
| ZA (1) | ZA743011B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19904523B4 (en) * | 1999-02-04 | 2012-03-15 | 3M Espe Ag | Method for dimension-true sintering of ceramic and ceramic tooth replacement part |
| EP3127507B1 (en) | 2015-08-03 | 2017-05-31 | Amann Girrbach AG | Sinter blank |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR400461A (en) * | 1908-06-06 | 1909-07-28 | Charles Albert Keller | Precise metering of carbon steel carburization process |
| US1674982A (en) * | 1922-05-11 | 1928-06-26 | Pittsburgh Res Corp | Electric furnace and method of carbonizing metallic charges therein |
| US2174520A (en) * | 1937-06-30 | 1939-10-03 | Kuniansky Max | Method of making cast iron |
| DE866045C (en) * | 1950-06-09 | 1953-02-05 | Forni Lubatti Soc | Process for carburizing liquid metal, in particular steel |
| US2762701A (en) * | 1954-03-03 | 1956-09-11 | Air Reduction | Carburizing molten ferrous metal |
| GB932348A (en) * | 1962-01-01 | 1963-07-24 | Sklenar Furnaces Ltd | Improvements relating to reverberatory furnaces and the melting of iron or iron alloys therein |
| US3788837A (en) * | 1972-03-22 | 1974-01-29 | Kloeckner Werke Ag | Method for melting particulate metal |
-
1973
- 1973-05-25 DE DE2326721A patent/DE2326721C2/en not_active Expired
-
1974
- 1974-03-26 BE BE142436A patent/BE812819A/en unknown
- 1974-04-23 IT IT5057674A patent/IT1046246B/en active
- 1974-05-03 FR FR7415369A patent/FR2230733B2/fr not_active Expired
- 1974-05-03 GB GB1964574A patent/GB1461579A/en not_active Expired
- 1974-05-09 CA CA199,401A patent/CA1012778A/en not_active Expired
- 1974-05-10 ZA ZA00743011A patent/ZA743011B/en unknown
- 1974-05-23 US US05/472,892 patent/US3953197A/en not_active Expired - Lifetime
- 1974-05-24 BR BR427274A patent/BR7404272D0/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB1461579A (en) | 1977-01-13 |
| BR7404272D0 (en) | 1975-01-07 |
| US3953197A (en) | 1976-04-27 |
| ZA743011B (en) | 1975-05-28 |
| FR2230733A2 (en) | 1974-12-20 |
| DE2326721B1 (en) | 1974-06-12 |
| FR2230733B2 (en) | 1977-06-24 |
| CA1012778A (en) | 1977-06-28 |
| AU6903474A (en) | 1975-11-20 |
| BE812819A (en) | 1974-07-15 |
| IT1046246B (en) | 1980-06-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| E77 | Valid patent as to the heymanns-index 1977 | ||
| 8340 | Patent of addition ceased/non-payment of fee of main patent |